MP3 interface and hard-drive music storage
Although many models currently offer an audio system with an auxiliary port for connecting an iPod or MP3 player, an integrated connection for these will probably become one of the commonplace creature comforts in most cars. The base $19,734 Suzuki Kizashi already has it, as does the $17,770 Scion tC, for example.
It gives you full control of your device through the audio system's head unit, which is safer and easier to use than the MP3 player itself. If you want to just leave that iPod at home, several advanced audio systems available in today's cars include a hard drive for directly downloading music for in-car storage. No CDs, no MP3 player and no iPod needed!